Decibel X: dB, dBA Noise Meter
4+

Sound Spectrum Analyzer & FFT

Screenshots

Description

"Decibel X" is one of very few noise meter apps on the market that has highly reliable, pre-calibrated measurements and supports dBA, dBC. It turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? "Decibel X" will help you answer all of those.

WHAT MAKE IT GREAT AND STAND OUT FROM OTHER APPS:

- Trusted accuracy: the app is tested and pre calibrated for all Apple devices. The precision is matching with real SPL devices- Apple Watch support: see noise level right from your wrist- Frequency weighting filters: ITU-R 468, A, B, C, Z- Powerful, smart history data management: + Recording data can be saved into a list of history records for future access and analysis + Each record can be exported as hi-res PNG graph or CSV text via sharing services + iCloud support which synchronize all history records across your Apple devices + Fullscreen mode to give overview the whole history of an record- Dosimeter with NIOSH, OSHA standards- FFT and BAR graphs to display real time FFT. Those are very useful for frequency analysis and musical tests. Real time predominant frequency is also displayed.- WAVE graph with 2 display modes: Rolling & Buffer- InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.).- Support both Portrait and Landscape layouts- Beautiful, intuitive and carefully crafted UI design- Optimized for iOS 11

OTHER GREAT FEATURES:

- Standard time weightings (Response Time): SLOW (500 milliseconds) and FAST (200 milliseconds)- Trimming calibration from -15 dB to 15 dB- Standard measurement range from 30 dBA up to 130 dBA- HISTO graph for plotted history of the recorded values- Real time scale level chart- Display Current, Average/Leq, and Max values with both nice and clear digital and analog layouts- Quick reference text to help you compare with real-life examples- "Keep Device Stay Awake" option for long duration recording- Reset and clear current recording at any time- Tap on Max value to reset at any time- Pause/Resume the tool at any time

NOTES:

- Please do not expect a quiet room reading will be 0 dBA. The range 30-130 dBA is the standard usable range and an average quiet room will be about 30 dBA.- Although all devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. You will need a real external device or calibrated sound meter as a reference, then adjust the trimming calibration until the reading matches with the reference.

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What’s New

Version History

6.6.0

Dec 18, 2018

● Adds support for running natively on Apple Watch. Decibel X will now measure directly using Watch's microphone instead of pairing results from phones● Adds support for the new iPad Pro● Adds premium membership with free trial period. The trial period will give full access and completely ad free● Adds show/hide usage tooltips button at the main screen● Fixes BAR graph issue which shows incorrect frequency axes● Fixes an issue of small overlay GUI in landscape● Fixes a bug when recording audio twice may cause a crash● Fixes many UI issues for iPad ● A lot of performance improvements and bug fixes● Component upgrades

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

6.5.1

Oct 16, 2018

● Fixes random crashing issue of Insta Decibel● Fixes UI issue on iPhone X family devices● Fixes an issue where many ad-free paid users still seeing ads at the beginning ● Fixes an issue where there now should open a warning message when sharing via Instagram, Facebook services but those apps are not installed yet● Several minor fixes & performance improvements

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

6.3.0

Jun 6, 2018

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

6.2.3

Apr 27, 2018

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

====== What's New version 6.2.3 ======- Fixes a UI issue which does not completely show the bottom of history logs- Components upgrade - Several minor improvements

6.2.2

Apr 10, 2018

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

====== What's New version 6.2.2 ======- Fixes a bug for users who purchased "Data Export" pack that still cannot export long recordings- Several minor improvements

6.2.1

Apr 6, 2018

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

====== What's New version 6.2.0 ======- Changes default theme to "Classic"- Fixes incorrect layout issue when switching theme- Fixes "Get It Free" button text should now be "Get" when promoting to PRO upgrade- Several minor improvements

====== Version 6.2.1 ======- Welcome a new theme: Modern Dark- Huge optimization: reduce app size by more than 50%- Fixes a crash bug when changing to landscape- Adds 85db threshold for Dosimeter- Fixes the examples chart bigger so that it will not show 2-line rows- Fixes the InstaDecibel overlaid information too small for iPhone Plus devices- Several stability improvements

6.2.0

Mar 27, 2018

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

====== What's New version 6.2.0 ======- Welcome a new theme: Modern Dark- Huge optimization: reduce app size by more than 50%- Fixes a crash bug when changing to landscape- Add 85db threshold for Dosimeter- Fixes the examples chart bigger so that it will not show 2-line rows- Fixes the InstaDecibel overlaid information too small for iPhone Plus devices- Several stability improvements

====== What's New version 6.1.0 ======- Supports iPhone X- Adds Dosimeter. Just tap on the bottom labels to show/hide the Dose & TWA measurements.- Adds Dose, TWA measurements in the history record and CS- Adds sound level examples chart- Saved records name now can be editable- Adds bouncing effect after saving a record to notify users to swipe up the list- Adds calibration +/- buttons in the settings for easier control- Fixes an issue which does not show the duration label when changing rotation from landscape to portrait- Fixes several iCloud issues- Code clean-up- Various bug fixes and stability improvements

6.1.0

Nov 16, 2017

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

This major update includes:- Supports iPhone X- Adds Dosimeter. Just tap on the bottom labels to show/hide the Dose & TWA measurements.- Adds Dose, TWA measurements in the history record and CS- Adds sound level examples chart- Saved records name now can be editable- Adds bouncing effect after saving a record to notify users to swipe up the list- Adds calibration +/- buttons in the settings for easier control- Fixes an issue which does not show the duration label when changing rotation from landscape to portrait- Fixes several iCloud issues- Code clean-up- Various bug fixes and stability improvements

6.0.1

Nov 2, 2017

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

This update includes:- Adds an option to show/hide the real life references label- Fixes iCloud syncing issue that now merges all history records among devices without duplicates- iCloud option is now default set to OFF- Better formatting exported CSV text - Code clean-up- Various bug fixes and stability improvements

6.0.0

Oct 20, 2017

Thanks for using Decibel 10! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel 10.

We're happy and proud to introduce this new version 6, including:- Changes the app name into "Decibel X"- Swipes up to reveal a whole new powerful history data list: + Recording data now can be saved into a list of history records for future access and analysis + Each record can be exported as hi-res PNG graph or CSV text via sharing services + iCloud support which synchronize all history records across your Apple devices + Fullscreen mode to give overview the whole history of an record- Adds MIN, MAX information for HISTO graph- Fixes crashing issue for some iOS 8 users- Auto pre fill our support email when tapping on the "Email Support" button in the settings- Remove the bottom ad wheel as requested by numerous users- Component upgrades and code clean-up- Various bug fixes and stability improvements

5.4.1

Sep 28, 2017

Thanks for using Decibel 10! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel 10.

What's new in this release:- Fix crashing issue when the device's zoom mode is set to "Zoomed"- Fix crashing issue when going into the App Store and then back- Improve stability & minor fixes

======= Version 5.4.0 ========- Support iOS 11 & iPhone 8/8 Plus- Fix crashing issue for some users when upgrade to PRO version- Fix randomly crashes when reseting data- Fix an UI issue which shows a bottom white line on iPhone 6 Plus- "BAR" graph now shows the whole peak column in white color for better visualization- Move "WAVE" graph to the last since it is least useful- Change "PRO version" asking at start more friendly- Users now can rate the app directly within the app instead of moving into the App Store as before- Add preview video on the store's page- Add "Email support" in the settings- Component upgrades and code clean-up- Various bug fixes and stability improvements

5.4.0

Sep 25, 2017

Thanks for using Decibel 10! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel 10.

What's new in this release:- Support iOS 11 & iPhone 8/8 Plus- Fix crashing issue for some users when upgrade to PRO version- Fix randomly crashes when reseting data- Fix an UI issue which shows a bottom white line on iPhone 6 Plus- "BAR" graph now shows the whole peak column in white color for better visualization- Move "WAVE" graph to the last since it is least useful- Change "PRO version" asking at start more friendly- Users now can rate the app directly within the app instead of moving into the App Store as before- Add preview video on the store's page- Add "Email support" in the settings- Component upgrades and code clean-up- Various bug fixes and stability improvements

5.3.3

5.3.2

- Fix issue which not allow to change frequency weightings in the settings- Several minor fixes

5.3.1

Jul 17, 2017

- Important fix for PRO users now should be able to change frequency weightings to A, B, C. We are very sorry for this bug.- Several minor fixes

5.3.0

Jul 14, 2017

This major update includes:

*** What's New ***

- New WAVE graph with two display modes: Rolling & Buffer.- SLOW and FAST modes can now be switched by tapping on the HISTO graph- New Shop with purchases options which can now be purchased separately in stead of only PRO option. PRO users still remain unchanged and enjoy Ad-free and all features unlocked- New app icon- Add "Privacy Policy" in the settings- Add "Duration" label at the main screen- Add remote notification for reporting important updates and notices in the future- Upgrade components

5.1.1

- New app icon- Add scale bar chart - Support auto rotate device upside down (device's auto rotation mode must be set to ON)- Frequency weighting filters: A, B, C- Tested and calibrated for much higher accuracy and liability, now matching with top rated apps and real SPL devices- Time weightings (Response Time): SLOW (500 milliseconds) and FAST (200 milliseconds)- Frequency analysis with real time FFT- New graphs: HISTO, FFT, BAR- Add "Keep Device Stay Awake" for long duration recording- Standard measurement range from 30 to 130 dB(A)- Exporting data up to 24 hours- Add "Restore Purchase" button in the settings- Add "Glossary" help section in the settings- Improve UI and icons for better readings and more beautiful- Trimming calibration range is now from -15 to 15 dB

5.1.0

Dec 14, 2016

Improvements in version 5.1.0:

- New app icon- Add scale bar chart - Support auto rotate device upside down (device's auto rotation mode must be set to ON)- Improve overlayed layout of InstaDecibel for iPhone 6/7 Plus- Reduce the number of ads- Translate app name into more languages- Add more information in "Glossary" help- Change banner ad for better UI- Fix issue that Duration does not reset when pressing button "Reset & Clear Data"- Fix issue that "Start Time" is incorrect when exporting data- Upgrade components into latest version- Several minor fixes

What's New in Version 5.0.0

- Frequency weighting filters: A, B, C- Tested and calibrated for much higher accuracy and liability, now matching with top rated apps and real SPL devices- Time weightings (Response Time): SLOW (500 milliseconds) and FAST (200 milliseconds)- Frequency analysis with real time FFT- New graphs: HISTO, FFT, BAR- Add "Keep Device Stay Awake" for long duration recording- Standard measurement range from 30 to 130 dB(A)- Exporting data up to 24 hours- Add "Restore Purchase" button in the settings- Add "Glossary" help section in the settings- Improve UI and icons for better readings and more beautiful- Trimming calibration range is now from -15 to 15 dB

Dec 18, 2018

Version 6.6.0

● Adds support for running natively on Apple Watch. Decibel X will now measure directly using Watch's microphone instead of pairing results from phones● Adds support for the new iPad Pro● Adds premium membership with free trial period. The trial period will give full access and completely ad free● Adds show/hide usage tooltips button at the main screen● Fixes BAR graph issue which shows incorrect frequency axes● Fixes an issue of small overlay GUI in landscape● Fixes a bug when recording audio twice may cause a crash● Fixes many UI issues for iPad ● A lot of performance improvements and bug fixes● Component upgrades

Thanks for using Decibel X! Please be sure to rate this new version and leave us a review on the App Store. Your feedback is greatly appreciated. We're listening to your feedback and working hard to improving Decibel X.

Ratings and Reviews

4.6 out of 5

39.4K Ratings

39.4K Ratings

treynolds57
,11/30/2017

Very Good, With One Quibble...

I’ve used a couple sound meter apps over the last few years along with a commercial quality sound level meter. I would put this up there with the best of what I’ve used. This review is for the purchased, “pro” version of the software. That I can pay $4.99 and use the processing capabilities of my iPhone in leu of spending $150+ on a professional, stand-alone meter blows my mind.

The level of detail shown in the various portions of the screen offer a broad range of information to the user. You get both numerical and graph output as well as dial analog output of minimum and maximum readings, duration, etc.

One quibble is that when I pause the meter and reset it, it asks if I really want to, which is okay, but immediately restarts the sound reading, even if I don’t want it to. Also, I’d like for a reset to take the meter back to “0”. It restarts at the prior average. I would like to see these twin issues corrected, and I’d then give the app 5 stars.

treynolds57
,11/30/2017

Very Good, With One Quibble...

I’ve used a couple sound meter apps over the last few years along with a commercial quality sound level meter. I would put this up there with the best of what I’ve used. This review is for the purchased, “pro” version of the software. That I can pay $4.99 and use the processing capabilities of my iPhone in leu of spending $150+ on a professional, stand-alone meter blows my mind.

The level of detail shown in the various portions of the screen offer a broad range of information to the user. You get both numerical and graph output as well as dial analog output of minimum and maximum readings, duration, etc.

One quibble is that when I pause the meter and reset it, it asks if I really want to, which is okay, but immediately restarts the sound reading, even if I don’t want it to. Also, I’d like for a reset to take the meter back to “0”. It restarts at the prior average. I would like to see these twin issues corrected, and I’d then give the app 5 stars.

Ziggy165!
,12/03/2018

Misleading app name, free version measures dBZ only

The app name is dB, dBA Noise Meter but what the developer doesn't tell us is that the app only reads Z-weighted decibels (dBZ) and not A-weighted decibels (dBA) in the free version. All the guidelines and standards say to measure noise levels in dB(A) as A-weighted decibels correspond to human hearing. So it's really misleading to the public who don't know any better.

dB(Z) levels are typically 10 decibels or more higher than dB(A) so people are always getting the wrong readings, unless they purchase the A-weighted portion. No explanation is provided, it's truly a disservice to people who think they're getting a good reading of their noise environment. Remember, a 3 dB increase in level means double the energy that reaches the ear, so 10 dB at the ear is a huge difference.

Developer should make this information available to the public. They benefit from their top ranking on the app store but forget they are spreading misinformation by not explaining to the public the difference between dBZ and dBA. I will gladly pay $10 for an app that provides readout in A-weighted decibels.

Ziggy165!
,12/03/2018

Misleading app name, free version measures dBZ only

The app name is dB, dBA Noise Meter but what the developer doesn't tell us is that the app only reads Z-weighted decibels (dBZ) and not A-weighted decibels (dBA) in the free version. All the guidelines and standards say to measure noise levels in dB(A) as A-weighted decibels correspond to human hearing. So it's really misleading to the public who don't know any better.

dB(Z) levels are typically 10 decibels or more higher than dB(A) so people are always getting the wrong readings, unless they purchase the A-weighted portion. No explanation is provided, it's truly a disservice to people who think they're getting a good reading of their noise environment. Remember, a 3 dB increase in level means double the energy that reaches the ear, so 10 dB at the ear is a huge difference.

Developer should make this information available to the public. They benefit from their top ranking on the app store but forget they are spreading misinformation by not explaining to the public the difference between dBZ and dBA. I will gladly pay $10 for an app that provides readout in A-weighted decibels.

MSLeach
,12/09/2017

Really Nice; How About This.

This is a great tool for audio enthusiast and semi pro apps.. very useful. How about this developer... what if you had a filter for the audio enthusiast that instead of showing air plane, riveter, streets noise, etc, it showed whispering, quiet conversation, normal conversation, public speaking, quiet church music, typical church music, loud church music, Jazz, Orchestra, Country Music Concert, Rap Music, Rock Concert. Each of these have associated typical levels such as...

60~67 Quiet Conversation67~70 Normal Conversation70~72 Public Speaking82~92 Quiet Church Music92~95 Typical Church Music95~102 Loud Church Music115~125 Rock ConcertEtc... you get the idea

These are all subject to I individual styles and preferences but the ideas is to get close, some type of base line for people who really have no idea what they’re doing but they knobs anyway (and you know who you are). This is very common in church music and small clubs where speakers mics are either so soft people lose interest or so loud it’s annoying. Or when the band is so soft it ruins the mood or so loud it’s dangerous to your ears. Many churches have no idea what is appropriate sound levels or what is borderline dangerous. I think this might be very helpful.

MSLeach
,12/09/2017

Really Nice; How About This.

This is a great tool for audio enthusiast and semi pro apps.. very useful. How about this developer... what if you had a filter for the audio enthusiast that instead of showing air plane, riveter, streets noise, etc, it showed whispering, quiet conversation, normal conversation, public speaking, quiet church music, typical church music, loud church music, Jazz, Orchestra, Country Music Concert, Rap Music, Rock Concert. Each of these have associated typical levels such as...

60~67 Quiet Conversation67~70 Normal Conversation70~72 Public Speaking82~92 Quiet Church Music92~95 Typical Church Music95~102 Loud Church Music115~125 Rock ConcertEtc... you get the idea

These are all subject to I individual styles and preferences but the ideas is to get close, some type of base line for people who really have no idea what they’re doing but they knobs anyway (and you know who you are). This is very common in church music and small clubs where speakers mics are either so soft people lose interest or so loud it’s annoying. Or when the band is so soft it ruins the mood or so loud it’s dangerous to your ears. Many churches have no idea what is appropriate sound levels or what is borderline dangerous. I think this might be very helpful.